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SUN 310-083 Exam Syllabus Topics:

SUN Sun Certified Web Component Developer for J2EE 5 Sample Questions:

1. The sl:shoppingList and sl:item tags output a shopping list to the response and are used as follows:
1 1. <sl:shoppingList>
1 2. <sl:item name="Bread" />
1 3. <sl:item name="Milk" />
1 4. <sl:item name="Eggs" />
15. </sl:shoppingList>
The tag handler for sl:shoppingList is ShoppingListTag and the tag handler for sl:item is
ItemSimpleTag.
ShoppingListTag extends BodyTagSupport and ItemSimpleTag extends
SimpleTagSupport.
Which is true?

A) ShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren() on the PageContext and casting each to an ItemSimpleTag.
B) ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling findAncestorWithClass() on the PageContext and casting the result to ShoppingListTag.
C) ShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren() and casting each to an ItemSimpleTag.
D) ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling getParent() and casting the result to ShoppingListTag.
E) It is impossible for ItemSimpleTag and ShoppingListTag to find each other in a tag hierarchy because one is a Simple tag and the other is a Classic tag.

2. The Squeaky Bean company has decided to port their web application to a new J2EE 1.4 container. While reviewing the application, a developer realizes that in multiple places within the current application, nearly duplicate code exists that finds enterprise beans.
Which pattern should be used to eliminate this duplicate code?

A) Model-View-Controller
B) Front Controller
C) Service Locator
D) Intercepting Filter
E) Transfer Object
F) Business Delegate

3. Given this fragment from a Java EE deployment descriptor:
1 24. <welcome-file>beta.html</welcome-file>
1 25. <welcome-file>alpha.html</welcome-file>
And this request from a browser:
http://www.sun.com/SCWCDtestApp/register
Which statement is correct, when the container receives this request?

A) The container first looks in the register directory for alpha.html.
B) The container first looks in the register directory for beta.html.
C) The container first looks for a servlet mapping in the deployment descriptor.
D) This deployment descriptor is NOT valid.

4. You need to create a JSP that generates some JavaScript code to populate an array of strings used on the client-side. Which JSP code snippet will create this array?

A) MY_ARRAY = new Array();
< % for ( int i = 0; i < serverArray.length; i++ ) {
MY_ARRAY[${i}] = '${serverArray[i]}';
} %>
B) MY_ARRAY = new Array();
< % for ( int i = 0; i < serverArray.length; i++ ) { %>
MY_ARRAY[<%= i %>] = '<%= serverArray[i] %>';
< % } %>
C) MY_ARRAY = new Array();
< % for ( int i = 0; i < serverArray.length; i++ ) { %>
MY_ARRAY[${i}] = '${serverArray[i]}';
< % } %>
D) MY_ARRAY = new Array();
< % for ( int i = 0; i < serverArray.length; i++ ) {
MY_ARRAY[<%= i %>] = '<%= serverArray[i] %>';
} %>

5. Your web application requires the adding and deleting of many session attributes during a complex use case. A bug report has come in that indicates that an important session attribute is being deleted too soon and a NullPointerException is being thrown several interactions after the fact. You have decided to create a session event listener that will log when attributes are being deleted so you can track down when the attribute is erroneously being deleted.
Which listener class will accomplish this debugging goal?

A) Create an HttpSessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getName method on the event object.
B) Create an SessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getAttributeName method on the event object.
C) Create an SessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getAttributeName method on the event object.
D) Create an HttpSessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getName method on the event object.

Solutions: